1. Which structure is the hierarchical model based on?   Tree   Graph   Linked List   None of these   Hint Half-n-half Clue   2. DBTG Codasyl is an example of _______ database.   relational   object - oriented   hierarchical   network   Half-n-half Clue   3. Which data model organizes the data in the form of tables and relations?   Hierarchical Model   Network Model   Relational Model   Half-n-half Clue   4. In Relational Model, rows are referred to as _______ and columns are referred to as _______.   tuples, attributes   nodes, connectors   connectors, nodes   attributes, tuples   Half-n-half Clue   5. For a database to be considered as full-fledged RDBMS, it has to comply with at least _______ out of the 12 Codd's rules.   1   6   9   10   Half-n-half Clue   6. The candidate keys that are not selected as the Primary key are known as _______.   foreign key   super key   alternate keys   secondary key   Half-n-half Clue   7. In the hierarchical model the relationship between records is expressed as _______.   pointers or links   parent-child   unique key for each record   Half-n-half Clue